Thanks Mathewpink I will try that at least you understood its my speedo I want to adjust, sat nav is ok but they loose signal now & then.

No sat nav stolen that's my problem how do I know I'm doing 30?

Can any one help with re calibrating my speedo have fitted disco diffs and im running on 235/85 x 16 tyres. Cant afford any points.

So when will the old man get a decent vehicle he has got the bug?